Two Pair in locust tree posturing/challenging each other on different branches.
My lady friend and I witnessed 2 pairs of Northern Flickers on separate branches.
They were bobbing up and down and advancing toward each other aggressively. This behavior went on for 15 to 20 minutes.
We didn't understand this behavioral pattern and what it meant. The birds were located in a locust tree outside a residence overlooking the Green Lane Reservoir, Pennsburg Pa. It was funny to see this strange movement/behavior and posturing.
How fascinating! I have seen flickers dance in the spring when they are courting. What strange antics they performed. The male bowed to the female, spreads his wings like a cape, and stepped forward and back again. He then attempted to display his every charm; he pleaded and coaxed in his mellowest and most enticing voice.
Definitely a devoted and skillful lover!